Expanding mandrel



E, E. STEVENSON EXPANDING IANDREL Filed Jan. 19. 1929 ISI 2f n.3., .F 59

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farai/KEY Aug. 12, 1930.

Patented Aug. 12, `,17930 e s.frrer.ssV veAral-:N'r i OFFICE i EDWARD E. srn'vENsN, or LofsANnrEs, CALIFORNIA,- AssreuoaTo*` nmsco'nnenrcx & EQUIPMENT o roem "nxrAivDrNe MANDREL .Appiicafionmea January 19. :1929. serial No. 333,565.

-My Yinvention relates to mandrelsjandin Fits preferred embodimentit consists ,eta

mandrel for aligningliners-.in the jacket of an oil pump barrel. f

V= Vg One of the .features ofthemandrelfofmy 'invention is :thatf-partrof the fliners (ormerm bersto be held thereby)l fmaybeplaoed' on and Vseen-red tot-hemandrel and 'afterwards one or more V additional liners. (or equivalentmem'- bers) .maybe .placed-thereon and, clamped in plaC6. Y "'ffjfi This designl offmandrlel is fespeeially dlesirable, -forY I .aligning liners y off @the character shown .inmy eopendin-g application entitled lMethed-otplaoingliners in asleeve fordeepV 'well oil -pumpsggSerial No. 302.2305` vfiled Au- .;gust. '27,^ 1928. In the.pu1np fbarrel fofk that application the endlin'ers 'have enlargements :which prevent. them i ,'from y being` extended through the pump jacket orsleelve. l .-'lhedis-y Aadvantage oftheusualitype of mandrel when'y usedI ont-his type of pump ifsfthatfthe .liners 1 cannot bei olampediin position #by expanding the mandrel u'n'tila-fterthemandrel fand liner assembly.l havebeen passedinto thej'aoket and the other end liner plaoed thereon.

One fof theyendf'liners; lbecause *of its en-V largement;rk must be placed on Athe mandrel vafter thefothe'r Iliners and 'the `mandrelA have been inserted .in-the racket'.k If the mandrel .weretiglhtened--befdrefall-.fthe:liners were assembled thereon,v lasfwould oco'ur'if it ywere expanded beforey the assembly .was y.inserted in the .jacken rtf-hei mandrel 'would be ruined since all fthe expansionfwould be -in y"the `end lw-lieaeltherewasne liner. l :M y. invention overoomes these objections by providingfa ymandrel-in ,whieh' a; plurality 1 oiliners may be elampedlthereon without inl V Ajuryl'tdthe man'drelfand `other liners may *afterwardfbe placed-on the mandrellnext to fthe first liners and clamped; in place. S

Other obj eots andfadvantages 'ofxny invention 'will befevlidenced in ftheffollowingf'detailed deseriptionoffmy invention.

Referringsto the accompanying drawing:

Figo 1`-is an.elevational view inysection.

:showingtheutilityof theinventionfi'Fi-g. '2fandy Fig. 3 .are sectional .views .ofthel :v ainvehtion. .l

Fig. A4 and Fig. 5 are sections takenon the corresponding lines of Figs. 2 and`3."

Referring to the drawing, 11 is a support consisting of a primary support-rod 12 and la secondary .support-rod 14. The supportrods 12 and 14 are threaded on their near ends COMPANY, 0F Los ANGELES, CALIFORNIA, -A conroRA'rIoNpoF CALI! i so that they may be screwedy into a `threaded opening 415 of an abutment 16. They abutinentvl has amedial shoulder '17 having beveled endxfaoes 18 gjandithas cylindrical een* |`tralizing'portions 19 which are vofV smaller diametery than the lshoulder 17.

Surrounding the primary support-rod 12 isr i l va lprimaryeXpan'sible means 2O which ,will nowbedesoribed Y. f .65 Surrounding thesupport-rod 12 is :a dis-Ak 'tanoe sleeve 21, the lower end ofiwhioh sur- -f rounds and is centralized bythe upper yoentralizing'shoulder 19. The lower end Yof this distance sleeve 21 isp-beveled and engages the upper'fbevel `face 18 ofthe shoulder 17. The

V.im Y

upper end ofthedistanee sleeve is centralized y. "by a ring 2.2 whichV is secured tothe distance' sleeve and engages the primary support-rod V12. `The upper end of the distance sleevehask y an externally jbeveled enid fac-e23.

:Surrounding the primary support-rod .12' abovethedistanoe sleeve 21 are intermedi-` ate primary expansible sleeves 25 and an end primary expansible sleeve y26. The intermediate and'end expansible sleeves are-rendered eXpan'sible 'at 4their lower ends by slits-f27,

wwhioh form strips 28.

` The lower ends are internally' beveledY so that the lower, ends of the strips l28 :have

V'beveled ends "29. VThe upper endsl vof the `intermedia-te yprimary expansible sleeves 25 are provided `with externally `beveled ends 30'. The 'beveled ends 29 ofzthelower inter- Vmediate primary expansible sleeve engage the beveled endV kof the distance sleeve21;

thebeveled ends 29 of the upper intermediaA ate primary expansible sleeve engage thewup#` per beveled end 30 of the lower expansible sleeve; and the lower beveled ends 29 of the 4 end primary expansible sleeve 26 engage the 4upper, beveled end 30 of the upper interme-v ydiateprimary expan'sible sleeve 25. The upper ends of the intermediate sleeves V25 are .centralized by'rings 33 `which are` securedV mili Y port-rod 12.

' ble sleeve 26 hasinternal threads 36 which receive a threaded end 37 of a collar 38. The Y collar 38 has a cylindrical opening` 39 through which the primary support-rod 12 entends forV centralizing the collar 36. For the pui pose of expanding the primary expansible means I provide the following described means. The upper end of the primary support-rod 12 has threads 40 and a nut 41 is screwed thereon. By screwing the nut 41 downward on the primarysupport-rod 12. the collar 3S moves the end primary expansr ble member 26 downward so that the lower beveled ends 29 on the strips 26 are expanded. f The end primaryerpansible member 26 likewise forces the intermediate cxpansible primary members 25 downward causing the strips 28 of these members to be'expanded due tothe engagement of the lower beveled ends 29 thereof and the upper beveled ends Below the abutment 16 is a secondary expansible `means 45, which will now be fescribed. i

i Surrounding the secondary support-rod 14 is an upper expansibie sleeve 46. The upper end of the sleeve 46 surrounds lower central*V izing means 12a, and a beveled end 47 of the sleeve 46 engages Vthe lower beveled tace 18 of the abutment 16. The lower end ofthe upper secondary eizpansible sleeve 46 is provided with slits 48 which form strips 4 The lower ends of the strips 49 are provided in the form of internally beveled ends 50, The extreme upper end of the sleeve 46 is centralized by the centralizing means 12a, as previously pointed out, and this sleeve 46 is further centralized by the centralizingring 52 which is secured in the sleeve 46 and contacts the secondary support-rod 14.

Arranged on the supportmod below the sleeve 46 is a lower` secondary eiipansible sleeve 53. The upper end of the sleeve 53 .is provided with an externally beveled face 54 adapted to be engaged by the beveled ends 50 of the strips 49. The/'lower end of the sleeve 53 is provided with slits 55 which form strips 56 similar to the strips 49 and also Asimilar to the strips 28 of the primary e-x pansible means.

The `upper end of the sleeve 53 is centrallzed by a centralizing ring 5S which is forced `V`into the upper end of this sleeve, and which contacts the secondary support-rod 14. Y The lowerend of the sleeve 53 is centralized directly above the strips 56 by means of a cen tralizing ring59 which is secured in the sleeve 53 and which contacts the secondary supportout.

centric.

For the purpose of expanding the secondary expansible means I provide a secondary expanding means which I shall now describe. This secondary expanding means is in the form of a nut 69 having a body 70, and a polygonal head 71. The body `70is provided with a cavity which is threaded at 72, and into which a lower threaded end 73 of the secondary support-rod 14 is screwed. By turning the nut 69 so that it is advanced upward on the secondary support-rod `14, the expander member `61 and the lower secondary expansible sleeve 53 are'moved upward so that the strips 49 and 56. are expanded.

The important part ofthe invention is, as has been already pointed out, that the primary expansible means and the-secondary expansible means maybe individually operated, one not affecting Vthe operation of the other. One of the important considerations is the central abutmentl which permits both of the expansible'means to be forcedtoward this abutment and to be expanded;

)In Fig. 1 the utility of my invention is illustrated. Inl this figure the numeral 75 represents the jacket of an oil well pump and the numeral 76 represents an up er collar which has been screwed into t e upper threadedend of the jacket. The numeral 77 represents an end liner havinganenlarge- -ment78 at the upper end thereof which pre- `liners except'thelower end liner'have been placed on the mandrel. The primary expansible means has been expanded so that' the liners which have been assembled thereon are rigidly held in alignment. i ,y l Thisfexpansion is-accomplished by screwing the primary nut '41 downwardly on the primary `support-rod 12 as already pointed After the parts have been clamped in ali frnment, and have been inserted into the kjacrlret75 as shown inFig. 1, the upper collar 38 may be screwed into place. The lower` means toward said abutment in order yto ex# end liner 7 7 is then installed in place as indicated by dotted lines 81.` The secondary expansible means is thenexpanded by screwing the seconda-ry nut-569 upward on thesecondary support-rod14. Y Y

It will be noted thatthe lower end of the lowest intermediate liner 79 terminates about lmidwayof the strips 49 y When the end liner Wis installed in placeand/the secondary expansible means isexpanded, these strips49 centralize the lower end of the lower intermediate liner 79 andthe upper end yof the lower end liner l77. rllhe lower end; ofthe lower end liner 77 is centralized by the strips 56. After the entire liner has been centralnation of: a support ;-an independentlyoperable primary expansible means on said support; an independently operable secondary exaandinOr means 'a for' ex andin saidv rin mary expansible'means; and secondary `ex-` panding means voperable*independentlyV of said primary means for expanding `said secondary expansible means.

2. In an exp'ansible mandrel, the combination of: a` support; an `abutment carried by said support; primary expansible means ,car-

ied by said support; primary expanding means for moving said primary expansible pand saine; secondary expansible means carried by said supporti; and secondary expanding meansv for moving said secondaryexpansible means toward .said abutment for expandinglsaid secondary expansibleineans.

3. In an expansible mandrel, the combination of: a support-rod; anl abutment rigidly secured to said rod; a. primary expansible sleeve surrounding vsaid rod and engaging said abutment; a secondary expansible sleeve surrounding said rod and engaging said abutment; primary expanding means for ex' pending said primary expansible sleeve; and secondary expanding means for expanding said secondary expansible sleeve;

4. In an expansiblemandrel, the Vcombination of: a support-rod; an abutment rigidly a secured tosaid rod; a primary expansible sleeve surrounding said' rod and engagingl said abutment, said, primary `'expansible sleeve being expansible remote fromsaid abutment; a secondary expansiblesleeve surrounding said rodand engaging said abutment; primary expanding means for expand-v ing said primary expansible sleeve; y'and sec The primaryand second-V aryfexpandingmeans fornexpandingfsai-dy secondary expansible sleeve.

`6. In'an expansi'ble mandrel; the combiner` tion of ay support-rod an abutmentrigidly.` secured to said rod; a. primary-fexpansible sleeveV surrounding :said `rod and i engaging f said"I abutment, said". primary 1 expansible sleeve' being lexpafii'sible, remotejromf said v abutment a` secondary expansible sleeve surf rounding said! ro'df andV engaging saidaibul-` ment, the endj of saidY secondary sleeve yremote from said abutment being ,expansible'; pri-4 maryl expanding means l. for expanding-'f said primary-expansible sleeve; and; secondary K expanding-means :for expanding sa-iid :sfecf expansible means on said support; primary f ondaryexpansible sleeve.

In anexpansible mandrel",th'eicombinae tioirof a support-rod ;f:an; abutment I-'igidlyk l secured'to saidirodya primary, expansible sleeve surrounding said rod jandy engaging said-abutment; a secondary expansible sleeve surrounding?said rod andV engaging;` said abutment; neutralizing means at said.- abutment for ce'nftralizing` adjacent ends ofsaid v rounding said rod and engaging said abutment; centralizing means at said abutmenty for centralizing adjacent ends of said primaryexpansible sleeve and said secondary vexpansiblesleeve; primary expanding means forA expanding said primary expansible i sleeve; and secondary expanding means for expanding said secondary expansible sleeve. 9. In an expansible mandrel, the combi-v nation of: a support-rod; an abutment rigidly secured to said rod; a primary expan-k sible sleeve surrounding said rod and engaging said abutment; a secondary expansible sleeve surrounding said rod andy engaging said abutment, the end of said secondary sleeve remote from said abutment being ex'- Vpansible; centralizing means at said abut-` ment for centralizing adjacent ends of said primary expansible sleeve and said secondary expansible sleeve; primary expanding means for expanding said primary expansible V sleeve; and secondary expanding means for expanding said secondary expansible sleeve.

10. In an expansible mandrel, the combination of: a support-rod; an abutment rigidl secured to said' rod; a primary expanm sib e sleeve surrounding said rod and engaging said abutment, said primary expansible sleeve being expansible remote from said abutment; a secondary expansible sleeve surrounding said rod and engaging said abut- 15 ment, the endV of saidsecondary sleeve remote from said abutment being expansible; oentralizin means at said abutment for cen* tralizing a jacent ends of said primary ex-V pansible sleeve andsaid secondaryexpansible no sleeve; primary expanding means for ex? pending said primary expansible sleeve; and secondary expanding means for expanding said condary expansible sleeve.` Y

'i 11. In an expansible mandrel, the com bi- Vas nationof: a support-rod; an' abutmentrlgidl `secured to said rod; a primary expansib e sleeve surrounding said rod and vengaging said abutment, said primary expansible sleeve including a distance sleeve adjacent 80 to `said abutment; a secondary expansible sleeve surrounding said rod and engaging said abutment; primary expanding means for `expanding said primary ,expansible sleeve; and secondary expanding means for 85 ex anding said secondary expansible sleeve.

testimon whereof, I have hereunto set my hand at os Angeles, California, this 10th day of January, 1929. c

n EDWARD E. STEVENSON. 

